A new re‏port suggests that there may be more to Sean Penn’s split from Robin Wright than “irreconcilable differences” – namely that the actor may have been cheating on his wife of 11 years.

A U.S publication claims that four days before Wright filed for divorce, Penn was spotted dining with a “very young, very attractive” brunette at San Francisco’s Café de la Presse restaurant.

“He seemed nervous and on edge,” a fellow diner told Usmagazine.com. “He didn’t seem very happy.”

Penn’s attorney confirms that the actor originally filed divorce papers in Marin County, California, on December 7, but changed his mind and had the petition dismissed on December 18.

However, Wright filed her own request for divorce on December 21, citing irreconcilable differences.

Penn's divorce papers stated November 30 as the date of their separation, Wright’s, December 1.

“It was bound to happen,” a source said of the split. “He always seemed like a bachelor at heart and the kind of guy who just couldn’t be married for long.”